Deprecate use of timezones.

tests/standalone/io/http_test.dart

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 //
 // VMOptions=
 // VMOptions=--short_socket_read
 // VMOptions=--short_socket_write
 // VMOptions=--short_socket_read --short_socket_write
 
 #import("dart:isolate");
@@ skipping 118 matching lines @@
     Expect.equals(1, request.headers["Host"].length);
     Expect.equals("www.dartlang.org:1234", request.headers["Host"][0]);
     Expect.equals("www.dartlang.org", request.headers.host);
     Expect.equals(1234, request.headers.port);
     response.statusCode = HttpStatus.OK;
     response.outputStream.close();
   }
 
   // Set the "Expires" header using the expires property.
   void _expires1Handler(HttpRequest request, HttpResponse response) {
-    Date date =
-        new Date.withTimeZone(
-            1999, Date.JUN, 11, 18, 46, 53, 0, new TimeZone.utc());
+    Date date = new Date(1999, Date.JUN, 11, 18, 46, 53, 0, isUtc: true);
     response.headers.expires = date;
     Expect.equals(date, response.headers.expires);
     response.outputStream.close();
   }
 
   // Set the "Expires" header.
   void _expires2Handler(HttpRequest request, HttpResponse response) {
     response.headers.set("Expires", "Fri, 11 Jun 1999 18:46:53 GMT");
-    Date date =
-        new Date.withTimeZone(
-            1999, Date.JUN, 11, 18, 46, 53, 0, new TimeZone.utc());
+    Date date = new Date(1999, Date.JUN, 11, 18, 46, 53, 0, isUtc: true);
     Expect.equals(date, response.headers.expires);
     response.outputStream.close();
   }
 
   void _contentType1Handler(HttpRequest request, HttpResponse response) {
     Expect.equals("text/html", request.headers.contentType.value);
     Expect.equals("text", request.headers.contentType.primaryType);
     Expect.equals("html", request.headers.contentType.subType);
     Expect.equals("utf-8", request.headers.contentType.parameters["charset"]);
 
@@ skipping 352 matching lines @@
 void testExpires() {
   TestServerMain testServerMain = new TestServerMain();
   testServerMain.setServerStartedHandler((int port) {
     int responses = 0;
     HttpClient httpClient = new HttpClient();
 
     void processResponse(HttpClientResponse response) {
       Expect.equals(HttpStatus.OK, response.statusCode);
       Expect.equals("Fri, 11 Jun 1999 18:46:53 GMT",
                     response.headers["expires"][0]);
-      Expect.equals(
-          new Date.withTimeZone(
-              1999, Date.JUN, 11, 18, 46, 53, 0, new TimeZone.utc()),
-          response.headers.expires);
+      Expect.equals(new Date(1999, Date.JUN, 11, 18, 46, 53, 0, isUtc: true),
+                    response.headers.expires);
       responses++;
       if (responses == 2) {
         httpClient.shutdown();
         testServerMain.shutdown();
       }
     }
 
     HttpClientConnection conn1 = httpClient.get("127.0.0.1", port, "/expires1");
     conn1.onResponse = (HttpClientResponse response) {
       processResponse(response);
@@ skipping 63 matching lines @@
   testReadInto(true);
   testReadInto(false);
   testReadShort(true);
   testReadShort(false);
   test404();
   testReasonPhrase();
   testHost();
   testExpires();
   testContentType();
 }